poor vid card choice to run wow, or anything at highest detail, especially at the monitors native 1080p resolution. that vid card is a mid-low range card. But your PSU choice doesnt allow for anything better than that anyway. http://www.fireballtech.com/tag/phenom-ii-x4-955-wow-fps/
read that, it may be helpful.
A good idea would be to go for at least a gtx460 or amd 6850. Ideal would be more like a gtx560 Ti. And a matching 500w good quality PSU from antec, seasonic or OCZ and corsair if you chose one of their higher end models.